Ore-concentrating table.



E. J. O'CONNELL.

ORE CONCENTRATING TABLE.

APPLICATION r1150 MAR. 29. 1916.

1,291,616. Patented Jan. 14, 1919.

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UNITED STATES PATENT FIGE.

EDWARD J. .OCONNELL, OF FORT WAYNE, INDIANA, ASSIGNOR TO DEISTER CONCEN-TRATOB COMPANY, A CORPORATION OF INDIANA.

ORE -GONOENTRATING TABLE.

Specification of Letters Patent.

Patented Jan. 1 1, 1919.

Application filed March 29, 1916. Serial No. 87,497.

To all whom it may concern:

Be it known that I, EDVARDmI. OCoN- NELL, a citizen of the United Statesof America, and resident of Fort Wayne, in the county of Allen and Stateof Indiana, have invented certain new and useful Improvements inOre-Concentrating Tables, of which the following is a specification.

This invention relates to improvements in ore concentrators of the classin which a reciprocating table with a riiiled surface is employed, andthe object of the improvement is to effect a distinct separation of themineral contents of ore pulp from the gangue as well as separatedischarge of the various minerals recovered from the pulp as it passesover the'table. For instance: In treating a pulp, containing lead andzinc, it is desirable that the two minerals be sepa rated from eachother as well as from the gangue inasmuch as the several minerals arebetter suited to subsequent metallurgical treatment when separated.

The invention contemplates such particular arrangement of the riillesand smooth unobstructed areas on the table as will effect the separationof the minerals from each other as well as from the gangue, even thoughthe quantity of pulp flowing over the table may vary to some extent.

The object of the improvement is accomplished by the constructionillustrated in the accompanying drawing which shows a plan view of aconcentrating table of a well known type with riiiles and unobstructedsurfaces arranged in accordance with the invention.

Referring now to the indicating characters marked upon the drawing: 1 isa reciprocating table, (2) is the tailings dischargeside thereof and (3)is its concentrates discharge end. 51 is the feed box and (5) is thedressing water distributing box, both of which are of the usualconstruction and arrangement. It is contemplated that the table shall besupported and connected with driving mechanism of the usual constructionand in the customary manner, and therefore, these being well known, arenot herein shown.

In constructing the invention the table (1) is formed in the usualmanner with a linoleum surface and with a series of superimposed riflles(6) extending in parallel relation with each other, the forward ends ofthe riiiles terminating respectively along a line 02-00 that extendsdiagonally forward from the feed-boxto a point at the tailings dischargeside a short distance from its juncture with the concentrates dischargeend, except a portion (7) of said riflles near said juncture that extendbeyond the line wm to a line y-y parallel therewith and also severalrifHes (8) nextfollowing the riiiles (7 which extend entirelyto the comcentrates discharge end of thetable; The rear portion of the tablepresentsf'a 'riflled surface and the forward portionof the tablepresents a large, smooth unriflled area (A) between the major portion ofthe riilles and the concentrates discharge end of the table, and also anunriflied portion (B), an extension of the former unrifiled portion,that lies between the extended riiiles (7) and the concentratesdischarge end, as well as a third unriilled portion (C) lying betweenthe extended rifl'les (8) and the tailings discharge side of the table.Thus, the table is formed with a series of riflles that terminate upon adiagonal line, there being an intervening group of riflles, some ofwhich terminate upon the table in a diagonal line parallel to the formerline of termination and another portion of which extend beyond thelatter riflles to the discharge end of the table, the interveningriflies dividing the unrillled areas (A) and (B) from the unrifiled area(C):

In the operation of the invention, pulp is introduced into the feed-boxfrom whence it passes onto the adjacent surface of the table and owingto the slant thereof tends to flow across to the tailings dischargeside. Dressing water introduced into the box (5) also passes onto thesurface and flows across in a similar manner. As the table is set inreciprocating motion, by means of the driving mechanism D, the solids ofthe pulp form in a flowing mass along the riille terminals, the heaviermineral portions thereof, being influenced to a greater extent becauseof the impellent movement of the table, being projected out upon theunriflled area be- 0nd the lighter solids where they are sub- ]ected tothe cross-flow of dressing-water. As the flowing mass of solidsencounters the extended riflles it becomes projected to some extentforwardly toward the area (B), the heavier mineral portions beingespecially infiuenced forwardly while the lighter worthless solids tendto pass across the extended riflles, their movement toward the tailingsdischarge side being aided by the cross-flow of dressing Water. Thatportion of the 1nineral which is of greatest specific gravity becomesprojected farther forward than the comparatively lighter portions andpasses onto the area (B) and is directed by the extended rifiies (8) tothe discharge edge of the table while being subjected to the cleaning.effect of the dressing water that flows across-its path. The lighterconstituents of the mass of solids. that flow along the terminals of themajor portion of the riffies be come; d i verted by the extended rifiiesto a lesser extent than the heavier mineral portions, andreadily passacross the extended rifiies and become discharged over thetailingsdischa-rge side ofthe table. The mineral portions however areobstructed in their transverse-movement to a greater extent by thegextended riflies, the lighter mineral particles being displaced by theheavier parti cles the. latter; crowds against the sides of". the;extended riflies, so that the lighter mineral as it becomes thusdisplaced passes across the extended riflies onto the smooth area (C),which, afiording no obstruction tothe lateral movement of the mineralallows it to flow away from the extended riffies before becomingdischarged from the table.

In this manner the heavier mineral becomes discharged separately fromthe lighter mineral, as it leaves the table directly over the area (B)and at the end of the extended riflles (8) What I claim is In an oreconcentrator of the class de scribed, a table having a series of riiflesupon its surface extending forwardly from its rear end and terminatingin a diagonal line that extends from itstfeed side to a point on itstailings discharge side suitably distant from its concentrates dischargeend, and an intervening group of rifi les extending'beyond the diagonalterminal line of the major portion of said riftles and extending totheconcentrates discharge end of the table, there being a smoothunobstructed area on each side of the said extending rifiies lyingbetween the said diagonal terminal line and the concentrates dischargeend, one of said unobstructed areas extending on one side along thetailings discharge side of the table and extending also along thatportion of the concentrates discharge end adj acent thereto.

In testimony whereof I aflix my signature, in presence of two witnesses.

EDWARD J. OCONNELL.

Witnesses:

MATILDA METTLER, W. G. BURNS.

Gonieaofl-thjapatent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington,D. 0.

